"American Stories" is a weekly radio program broadcast on the Voice of America. These are aimed at second language learners of English. However, they are still quite interesting for native English speakers, too.
Each program is about 15 minutes.
Total listening time is about 10 hours.
About the MP3 Files
The MP3 files have been non-destructively edited, without re-encoding the MP3, so there has been no loss in audio quality. The only editing that was done was to crop off the intro music and the exit music to keep the file size down and to save listeners some time.